devel/caf: fix build on GCC architectures

Some files require including sys/types.h before other headers:
/usr/include/netinet/ip.h:227:2: error: 'u_short' does not name a type; did you mean 'short'?

227 |  u_short  ippseudo_len; /* protocol length */
    |  ^~~~~~~
    |  short

PR: 245364
Approved by: leres (maintainer)
MFH: 2020Q2 (build fix blanket)